The OWN reality star and restaurant owner filed a lawsuit against Tim Norman, claiming he illegally used her trademark for three of his new restaurants.

Looks like things have gone sour between Sweetie Pie’s Robbie Montgomery and her son and business partner Tim Norman. Reports state that the former OWN reality star and owner of theSweetie Pie’s restaurants is currently suing him.

According to the St. Louis Dispatch, the suit, which was filed Monday in a St. Louis federal court, claims that Norman illegally used the trademarked Sweetie Pie’s name at three new restaurants he opened in St. Louis and California, which are not franchised under his mother’s brand. The lawsuit also accuses Norman of misusing signage and promotional materials for his locations and diverting “substantial sums” of revenue from one of Montgomery’s restaurants to his new ventures, the newspaper noted.

Essentially, Montgomery claims that her son has now made it difficult for her to market and sell a Sweetie Pie’s franchise in Los Angeles and the St. Louis region.

This lawsuit is just another blow that the Montgomery family has had to endure in the past year. In March, Montgomery’s 21-year-old grandson Andre Montgomery was tragically shot and killed. Not to mention, one of the family’s St. Louis locations was recently broken into and robbed.

We truly hope that they can resolve these legal issues quickly and move on as a family.